parkinson



(N0 Model.)

WITNESSES:

A nwsmqom g ATTORNEYS.

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UNfirlD STATES.

PATENT OFFICE.

JOHN H. PARKINSON, OF BODIE, CALIFORNIA, ASSIGNOR TO HIMSELFJAND JOSEPH D. KERBAUGH, OF SAME PLACE.

CABLE-RAILWAY GRIP.

SPECIFICATION forming part of Letters Patent No. 315,325, dated April 7, 1885.

Application filed July 8, 1884.

To all whom it may concern:

Be it known that I, JOHN H. PARKINSON, of Bodie, in the county of Mono and State of California, have invented a new and Improved Cable-Railway Grip, of which the following is a full, clear, and exact description.

My invention relates to improvements in cable-railway grips; and it consists in the pe culiar construction and arrangement of parts,

IO as hereinafter fully described, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 isa sectional side view of my improved cable-grip with one of the jaws removed. Fig. 2 is a vertical cross-sectional elevation of the grip, and Fig. 3 is a perspective view of one of the cable-gripping rollers.

The letters A B indicate, respectively, the two opposite jaws of the grip, which have fixed lugs a b, respectively, through which a heavy pin or pivot, 0, passes, to hinge the two jaws to each other. The pin 0 also passes through the enlarged lower end of a suitable heavy bar, D, whereby both the j aws A B, while being free to swing upon the pin 0, will be held securely to the bar D.

At the lower end and at their inner faces both of the jaws A B are provided with a series of rollers, E, which are journaled by eccentrically-placed end pins or gudgeons, e e, in suitable bearings in the ends of the jaws, 3 5 and so as to range vertically or lengthwise with the jaws and at right angles with the pivotpin 0 of the jaws.

I have shown metal plates or strips F F secured along the faces of the jaws over the j ouro nals e e of the grip-rollers, to hold the rollers to place; but any approved method of mounting the rollers in the jaws may be employed which will permit the rollers to grip the cable G by their concave peripheries. A roller, H, 4 5 fitted to revolve at the lower end of bar D between fixed lugs d d of the-bar, isadapted to hold the cable G down to place between the opposite grip-rollers E E should the cable tend to rise, and as the roller H is free to turn (No model.)

the cable will be injured by the contact.

The letter I indicates a wedge which is fitshould the cable touch it neither the bar nor 5o ted to slide upon the bar D, and is connected by the rods J J, one at each side of the bar, with a head-frame, K, which also is fitted to slide on the bar D, and connects by an arm or yoke, L, pivoted to it at Z, with a lever, M, to i which lever M the arm L is connected by a pivot, m, and in front of the fulcrum-pin n of the lever, by which pin a the lever is pivoted to an arm or bracket, N, held to the top of the bar D, and so that as the lever M is moved the wedge I will be moved correspondingly to close the jaws A B and carry the opposite rollers E E to the cable G to grip the cable and allow the jaws to open to release the cable. A downward movement of theleverand wedge forces the pins 0 o, fixed to the inner faces of the opposite jaws, will expand and open the jaws to carry the opposite gripping-rollers away from t the cable for stopping the car, as will be readily understood. The bar D is slotted at I? to give room for the descending arm L, and at Q the bar D is prolonged somewhat, and is slotted at q for the entrance of the lever M to lock it sidewise for greater security when lowered to its connections at m a with the yoke L and arm n. The rods J J are threaded into the wedge I, and nuts t'k are threaded on the rods above the wedge, and above and below the head, respectively, so that the wedge may be adjusted vertically with relation to the gripping-jaws and the lever, as may be required;

The grip will be held in any suitable manner to the frame of the car or vehicle to be pro:

havea cam action on the cable to tighten thereon gradually and without violent shocks, which would be liable to damage the grip or the car, while the hold will be secure, and the tendency of the cable to slip through the grip will be much less than with other constructions, and, in fact, the slipping will almost wholly be prevented, and the action of the eccentrically-pivoted rollers will be the same whichever way the cable and car may run.

I am aware that a grip having jaws provided with rollers having eccentric-grooved faces and operated by a sliding wedge is old, and I therefore do not clainrsuch invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, in a cable-railwaygri p, of the jaws A B, pivoted together and to the bar D on a pin, 0, rollers E, eccentrically pivoted in the opposing faces of the jaws, an antifriction roller, H, journaled to the end of the bar D, a wedge, I, fitted to slide on the bar- 

